This document summarizes a research study that performed morphometric analysis of 17 subwatersheds of the West Lidder River catchment in India. The study utilized geospatial techniques and a digital elevation model to generate drainage patterns and calculate various morphometric parameters of the subwatersheds. Key findings included: - Stream order ranged from 2 to 5, with higher orders on the west side indicating greater surface runoff contribution. - Total stream length was highest for first order streams and decreased with increasing order, indicating drainage depends mainly on catchment characteristics with no basin upliftment. - The west side had longer total stream lengths of all orders, suggesting it is more hydrologically active with longer travel times

1. Hindawi Publishing Corporation
Geography Journal
Volume 2013, Article ID 178021, 14 pages
http://dx.doi.org/10.1155/2013/178021
Research Article
Morphometric Analysis to Infer Hydrological Behaviour of
Lidder Watershed, Western Himalaya, India
Farrukh Altaf, Gowhar Meraj, and Shakil A. Romshoo
Department of Earth Sciences, University of Kashmir, Hazratbal, Srinagar, Kashmir 190006, India
Correspondence should be addressed to Gowhar Meraj; gowharmeraj@gmail.com
Received 17 January 2013; Revised 1 March 2013; Accepted 3 March 2013
Academic Editor: Biswajeet Pradhan
Copyright © 2013 Farrukh Altaf et al. This is an open access article distributed under the Creative Commons Attribution License,
which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
West Lidder River, in the Northwest Greater-Himalayan mountain range, is the major source of irrigation and drinking water
supplies for the Kashmir Valley with a population of seven million people. The major source of water for the whole Lidder River
is snow and icemelt emanating from its two subcatchments East Lidder and West Lidder. Snowmelt significantly contributes to
the evolution of drainage patterns in this area. Quantitative morphometry plays a vital role in routing the snowmelt and other
hydrological processes. Morphometric analysis of the West Lidder River catchment was carried out using geospatial technique. The
outcome revealed that the entire study area has uniform lithology and is structurally permeable. The high drainage density of all
subwatersheds indicate more surface runoff. The morphometric analysis also indicates that the area is more prone to weathering due
to very-coarse to coarse drainage texture. All the subwatersheds showed dendritic to subdendritic drainage pattern. An immense
control of structure on the drainage in some subwatersheds is indicated by their high bifurcation ratios. Circulatory and elongation
ratios show that the subwatersheds have elongated to circular shapes. From the integrated analysis of the morphometric parameters,
important hydrologic behaviour of 17 subwatersheds could be inferred.
1. Introduction
The measurement and mathematical analysis of the configuration of the earth’s surface, shape, and dimension of its
landforms is called morphometry [1–3]. To understand the
evolution and behaviour of drainage patterns, several quantitative methods have been developed [4, 5]. In hydrology,
basin drainage characteristics are fundamental in understanding various hydrological processes. Since watershed is
the basic unit in hydrology; therefore, morphometric analysis
at watershed scale is advantageous and preferable rather carry
it out on individual channel or inconsistent segment areas.
Watershed is an area of surface whose major runoff is conveyed to the single outlet and is the appropriate unit to study
several processes of the land surface. For example, watershed
is considered a fundamental erosional landscape element,
wherein conspicuous interaction of land and water resources
takes place. Being fundamental units of fluvial terrain, considerable research focal point has been done on watershed
geometric characterization such as stream network topology
and quantitative narration of shape, pattern, and drainage
texture [5]. Hydrologic and geomorphic processes occur
within the watershed, and morphometric characterization at
the watershed scale reveals information regarding formation
and development of land surface processes [6, 7] and thus
provides a holistic insight into the hydrologic behaviour of a
watershed. Basin travel time, time to hydrograph peak (basin
lag time), and intensity of erosional processes operating at
watershed scale can be predicted with better insight and
accuracy from morphometric evaluation of a watershed.
For unguaged watersheds wherein, in addition to hydrology,
information regarding soil, geology, geomorphology, and so
forth is also scarce, morphometric analysis provides a very
good alternative to understand the underlying factors controlling the hydrological behaviour [8]. Furthermore, there
are a myriad of practical applications of quantitative morphometric analysis such as river basin evaluation, watershed
prioritization for soil and water conservation, and management of natural resources. Watershed morphometric analysis
dispenses a quantitative description of the drainage system
and thus enabling a better characterization of watersheds
[9]. The role of landform processes, soil physical properties,

2. 2
and erosional characteristics in shaping the idiosyncrasy of
different watersheds can be best evaluated through juxtaposing their morphometric parameters [7]. Using conventional
techniques, morphometric characterization of many river
basins and subbasins in different parts of the globe has been
carried out [9–11]. With the advancement in geospatial and
computer technology, assessment of the drainage basin morphometry has been more accurate and precise. Nowadays,
using Geographical Information System (GIS) technique,
various terrain and morphometric parameters of the drainage
basins are evaluated with more ease and better accuracy.
Satellite data and GIS tools have been successfully employed
to generate data on the spatial deviations in drainage characteristics thus providing an insight into hydrologic conditions
necessary for developing watershed management strategies
[12–14]. GIS, being a powerful tool for the manipulation
and analysis of spatial information, provides a flexible environment for morphometric analysis. In the present study,
morphometric characterization of 17 subwatersheds of the
West Lidder River catchment was performed in GIS environment. The importance of morphometric analysis for this
region lies in the fact that Lidder River forms the back bone
of irrigation, drinking water supplies, and economy of the
Kashmir valley. Snowmelt runoff contributes significantly
to the drainage evolution of the area. Comparison of the
quantitative morphometric parameters of subwatersheds of
a river helps in understanding the geomorphological effects
on the spatiotemporal variation of the hydrological functions.
Moreover, some of the morphometric parameters such as
circularity ratio and bifurcation ratio are input parameters
in the hydrograph analysis [15–18] and evaluation of surface
water potential of an area [19]. In this context, this work
represents a better understanding of hydrologic behaviour
of the study area and its impact on various socioeconomic
aspects of the valley of Kashmir. Moreover, a more rational approach of drainage morphometric analysis has been
employed in this study compared to other automatically
DEM-based drainage generation methods [20, 21]. It uses
natural stream network and lake information to condition
the DEM prior to the calculation of flow direction and flow
accumulation grids. This greatly reduces error introduction
in the form of spurious drainage.
2. Materials and Methods
2.1. Materials
2.1.1. Study Area. The West Lidder catchment occupies
the Southeastern part of the Kashmir valley and is situated between 34∘ 09 󸀠 01 󸀠󸀠 N–34∘ 14 󸀠 00 󸀠󸀠 N and 75∘ 06 󸀠 00 󸀠󸀠 E–
75∘ 23 󸀠 29 󸀠󸀠 E (Figure 1). Forming a part of the middle
Himalayas and lying between the Pir Panjal range in the
South and Southeast, the north Kashmir range in the Northeast, and Zanskar range in the Southwest, the study area
has a unique geoenvironmental setting making it a suitable
niche to many of the important glaciers such as Kolahoi.
The West Lidder catchment has been engraved out by West
Lidder River, a left bank tributary of River Lidder which
Geography Journal
finally drains as a right bank tributary of River Jhelum. It
has a catchment area of 350.6 km2 , which constitute about
27.80 per cent of the total catchment area of river Lidder
[29, 30]. The valley begins from the base of the snow field
called the Kolahoi giving rise to West Lidder catchment. The
latter joins the East Lidder which originate from another
snow field called Sheshnag near the famous tourist town
of Pahalgam. From this point onwards, it is referred as
River Lidder. The latter joins the Jhelum (upper stream
of Indus River) at Gur Village after travelling a course of
70 km [30]. Combined action of glaciers and rivers has
bestowed West Lidder catchment a marked topography. The
valley possesses distinctive climatic characteristics because of
its high altitude location and its geophysical setting, being
enclosed on all sides by high mountain ranges. The study
area receives precipitation in the form of both rain and snow.
The mean annual precipitation at Pahalgam rain gauge station
is 1267.2 mm. The highest rainfall of 1629 mm was recorded
during the year 1994 and the lowest of 899.9 mm during the
year 2000. The area receives the highest rainfall in the month
of March (208.8 mm) and the lowest in the month of October
(45.9 mm). Such a climatic regime is peculiar characteristic
of sub-Mediterranean type of climate. Moreover, 70 per cent
of its annual precipitation concentrated in winter and spring
months [31].
2.1.2. Data Sets Used. The data sets used in this study for
accomplishing the respective objectives are as follows.
(i) Quantitative morphometry: ASTER DEM 30 m.
(ii) Survey of India (SOI) topographical maps at 1 : 50,000;
Dated: 1969: Natural drainage delineation.
2.2. Methods
2.2.1. Drainage Generation. Drainage was generated from
Advanced Space borne Thermal Emission and Reflection
Radiometer (ASTER) 30 m digital elevation model (DEM)
in GIS environment. The Arc Hydro approach was used for
drainage generation which is more logical and consistent
when compared to a manual approach [32]. There is no
distinction between water filled stream channels and land
surface in a DEM. In order to incorporate already existing
streams and lakes into the DEM for drainage analysis, a
process termed as DEM manipulation is followed. Natural
drainage present in SOI toposheets was digitized and used
to manipulate the DEM. For proper determination of flow
direction and flow accumulation, DEM sinks were identified
and filled. Boundaries of the 17 subwatersheds were derived
by defining pour point for each subwatershed (Figure 1). The
pour point is the location where water drained from whole
of the watershed flows into the main river. Based on the
cumulative number of the upstream cells draining to each
cell, stream network in both the watersheds was defined.
We used a critical threshold 0.06 which represents the 6%
area in all 17 subwatersheds for defining streams. The critical
threshold is the minimum upstream drainage required to
initiate a stream. Area of the watershed was evaluated by

3. Geography Journal
3
73∘ 40 󳰀 0 󳰀󳰀 E
74∘ 0 󳰀 0 󳰀󳰀 E
74∘ 40 󳰀 0 󳰀󳰀 E
74∘ 20 󳰀 0 󳰀󳰀 E
75∘ 0 󳰀 0 󳰀󳰀 E
75∘ 20 󳰀 0 󳰀󳰀 E
75∘ 40 󳰀 0 󳰀󳰀 E
N
W
E
S
34∘ 20 󳰀 0 󳰀󳰀 N
34∘ 0 󳰀 0 󳰀󳰀 N
33∘ 40 󳰀 0 󳰀󳰀 N
Kilometers
10
33∘ 20 󳰀 0 󳰀󳰀 N
Kashmir Valley, J and K, India
75∘ 5 󳰀 0 󳰀󳰀 E
∘
75∘ 10 󳰀 0 󳰀󳰀 E
75∘ 15 󳰀 0 󳰀󳰀 E
75∘ 25 󳰀 0 󳰀󳰀 E
75∘ 20 󳰀 0 󳰀󳰀 E
N
󳰀 󳰀󳰀
34 15 0 N
W
E
WS8
S
WS5
WS9
34∘ 10 󳰀 0 󳰀󳰀 N
WS7
WS6
Kolahoi Glacier
WS4
WS3
WS10
WS14
WS2
WS11 WS12
∘ 󳰀 󳰀󳰀
34 5 0 N
WS13
Pahalgam
WS1
WS15
WS16
WS17
Kilometers
10
34∘ 0 󳰀 0 󳰀󳰀 N
Prominent landmarks
Subwatershed boundary
Figure 1: Showing location of the study area in 2D and 3D perspectives.
calculating the geometry of the derived watershed polygons,
and length of the watershed was calculated by summing the
length of the main stream channel and the distance from
the top of the main channel to the watershed boundary.
By summing the lengths of all stream segments in each
subwatershed the total stream length was calculated.
2.2.2. Quantitative Morphometry. In the present study, morphometric analysis of the parameters, namely, stream order,
stream length, bifurcation ratio, relief ratio, drainage density, drainage intensity, drainage texture, stream frequency,
drainage texture, form factor, length of overland flow, constant channel maintenance, circulatory and elongation ratio,
area, perimeter, and length of all the 17 subwatersheds have
been carried out using the standard mathematical formulae
given in the Table 1 [9, 10, 19, 22–28]. The values of various
basin characteristics required for calculating morphometric
parameters are shown in Table 2.
3. Results and Discussion
3.1. Stream Order (U). The highest stream order among the
17 subwatersheds is five and is shown by four subwatersheds:
WS7, WS8, WS9 and WS10. The lowest stream order is two
and is shown by WS17. A perusal of Table 3 and Figure 1
indicates that the 17 subwatersheds draining into West Lidder
River are contributing surface runoff and sediment loads
differentially due to variations in their physical characteristics. There are only 7 subwatersheds in the East side of the
river among which five watersheds have 𝑈 = 4 and only
two watersheds have 𝑈 = 5. In the West side of the river,
there are 10 watersheds out of which four watersheds have
𝑈 = 3, two watersheds have 𝑈 = 4, three watersheds have
𝑈 = 5, and only one watershed has 𝑈 = 2. Drainage
maps of all the 17 subwatersheds are shown below (Figures
4(a), 4(b), and 4(c)). Higher stream order is associated with
greater discharge, and higher velocity [33]. West side of the
river clearly contributes more to discharge and since higher

4. 4
3.2. Stream Length (Lu)/Mean Stream Length (Lsm). Analysis
of the results shown in Tables 3 and 4 show that the total
length of stream segments is the maximum in case of first
order streams. It decreases as order increases in all the
subwatersheds (Tables 3 and 4; Figure 4). The results reaffirm
the fact that the area is underlain with uniform lithology with
no probable basin upliftment. The observation demonstrates
that the area depends only on the drainage characteristics for
movement of water. Further, since there are more number
of watersheds in the West side of the river and the total
stream length of all the orders from this side is greater than
the East side, therefore, the longer travel times [35] makes
this side hydrologically very active. From this observation, it
is concluded that during a same intensity storm event over
whole of the East or West side of the river [36], the East side
will show short basin lag times [37] compared to West side
under similar soil moisture [38, 39] and vegetation cover [39].
Moreover, Table 4 indicates that Lsm in these subwatersheds
range from a minimum of 0.21 km for stream order 2 of WS5
to a maximum of 6.69 km for the order 3 of WS13. According
to the Horton’s law of stream lengths, Lsm of any given order is
greater than that of lower order. This geometric relationship
can be seen in Figure 3. A comparative analysis of Lsm and
stream length ratio RL of all the subwatersheds is shown in
Table 4.
3.3. Stream Frequency/Channel Frequency (Fs). Stream frequency (Fs) is the total number of streams of all orders per
unit area. The analysis of the results shown in Table 5 shows
that Fs is maximum in subwatershed WS12 (8.19/km2 ), followed by WS8 (7.98/km2 ), WS9 (7.82/km2 ), WS13 (7.05/km2 ),
WS7 (7.04/km2 ), WS5 (7.02/km2 ), WS10 (6.70/km2 ), WS6
(6.52/km2 ), WS16 (6.15/km2 ), WS1 (5.93/km2 ), WS4 (5.78/
km2 ), WS15 (5.64/km2 ), WS3 (5.63/km2 ), WS2 (5.15/km2 ),
WS11 (4.52/km2 ), WS14 (4.12/km2 ) and WS17 (3.47/km2 ). Fs
has been related to permeability, infiltration capacity, and
relief of watersheds [40, 41]. The values observed in West
Lidder indicate that W12 is having rocky terrain and very low
infiltration capacity out of all the 17 subwatersheds. Further,
it is noted that Fs decreases as the stream number increases.
Fs of WS17 reveals that this subwatershed is comparably
covered with good amount of vegetation and has very good
infiltration capacity. Overall, the results of Fs reflect early
3
2.5
Stream number (log10 )
velocity enhances the erosion rates, therefore, this side also
contributes higher sediment loads into the West Lidder River.
Further, the total number of stream segments decrease with
stream order. This is referred to as Horton’s law of stream
numbers. Any deviation indicates that the terrain is typified
with high relief and/or moderately steep slopes, underlain by
varying lithology and probable uplift across the basin [34]. In
practice, when logarithms of the number of streams of a given
order, are plotted against the order, the points lie on a straight
line [22]. Similar geometric relationship was also found to
operate between stream order and stream numbers in all
subwatersheds of this study area. It indicates that the whole
area has uniform underlying lithology, and geologically, there
has been no probable uplift in the basin (Figure 2).
Geography Journal
2
1.5
1
0.5
0
1
2
WS1
WS2
WS3
WS4
WS5
WS6
WS7
WS8
WS9
3
Stream order
4
5
WS10
WS11
WS12
WS13
WS14
WS15
WS16
WS17
Figure 2: Showing relation between stream order and number of
streams for 17 subwatersheds.
peak discharge for subwatersheds in order of their decreasing
Fs resulting in flash floods, while the discharge from WS17
takes longer time to peak because of low runoff rates due to
lesser number of streams [42–44].
3.4. Bifurcation Ratio (Rb)/Mean Bifurcation Ratio (Rbm).
Analysis of the results shown in Table 5 shows that mean
bifurcation ratio (Rbm) of the 17 subwatersheds is 3.6, 3.7, 4,
4.1, 2.7, 4.8, 4.7, 4.5, 6.4, 5.3, 3.6, 10.2, 9.1, 4.6, 4.2, 4.4, and 3.0,
for WS1 to WS17, respectively. Rbm does not precisely remain
constant from one order to the next, because of possibility of
variations in watershed geometry and lithology, but it tends to
be a constant throughout the series. High Rbm indicates early
hydrograph peak with a potential for flash flooding during
the storm events [45, 46]. Moreover, wherever in a basin,
powerful geological control dominates; Rbm shows only a
small variation for different regions on different environment
[10]. Higher Rbm values are the characteristics of structurally
more disturbed watersheds with a prominent distortion in
drainage pattern and vice versa [14]. Maximum Rbm is
seen for WS12 (Rbm = 10.2), and thus it will show early
hydrograph peak (smaller basin lag time) which also indicates
strong structural control on the drainage development for
this watershed. The minimum Rbm is observed for WS5
(𝑅𝑏𝑚 = 2.79), indicating delayed hydrograph peak.
3.5. Relief Ratio (Rh). Quantitatively, it is the measurement
of the overall steepness of a drainage basin. Also, it is an
indicator of the intensity of erosion processes operating on
the basin slopes [47]. Rh normally increases with decreasing
drainage area and size of a given drainage basin [48]. In

5. Geography Journal
5
Table 1: Methodology adopted for computation of morphometric parameters.
S. No.
1
Morphometric parameters
Stream Order (𝑈)
2
Stream Length (𝐿𝑢)
3
Mean Stream Length (𝐿𝑠𝑚)
4
Formulae
Hierarchical rank (Strahler Scheme)
Reference
[9]
Length of the stream
[22]
𝐿𝑠𝑚 = 𝐿𝑢/𝑁𝑢; Where, 𝐿𝑠𝑚 = mean stream length; 𝐿𝑢 = Total stream length of
order “𝑢”; 𝑁𝑢 = Total no. of stream segments of order “𝑢”
[9]
Stream Length Ratio (𝑅𝐿)
𝑅𝐿 = 𝐿𝑢/𝐿𝑢 − 1; Where, 𝑅𝐿 = Stream length ratio; 𝐿𝑢 = The total stream length of
order “𝑢”; 𝐿𝑢 − 1 = The total stream length of its next lower order
[22]
5
Bifurcation Ratio (𝑅𝑏)
𝑅𝑏 = 𝑁𝑢/𝑁𝑢 + 1; Where, 𝑅𝑏 = Bifucation ratio; 𝑁𝑢 = Total no. of stream segments
of order “𝑢”; 𝑁𝑢 + 1 = Number of segments of the next higher order
[23]
6
Mean Bifurcation Ratio (𝑅𝑏𝑚)
7
Relief Ratio (𝑅ℎ)
𝑅ℎ = 𝐻/𝐿; Where, 𝑅ℎ = Relief ratio; H = Total relief (Relative relief) of the basin in
Kilometre; 𝐿𝑏 = Basin length
[23]
8
Drainage Density (𝐷)
𝐷 = 𝐿𝑢/𝐴; Where, 𝐷 = Drainage density; 𝐿𝑢 = Total stream length of all orders; A =
Area of the basin (km2 )
[24]
9
Stream Frequency (𝐹𝑠)
𝐹𝑠 = 𝑁𝑢/𝐴; Where, 𝐹𝑠 = Stream frequency; 𝑁𝑢 = Total no. of streams of all orders;
𝐴 = Area of the basin (km2 )
[24]
10
Drainage Texture (𝑅𝑡)
𝑅𝑡 = 𝑁𝑢/𝑃; Where, 𝑅𝑡 = Drainage texture; 𝑁𝑢 = Total no. of streams of all orders;
𝑃 = Perimeter (km)
[22]
11
Form Factor (𝑅𝑓)
𝑅𝑓 = 𝐴/𝐿𝑏2 ; Where, 𝑅𝑓 = Form factor; 𝐴 = Area of the basin (km2 ); 𝐿𝑏2 = Square
of basin length
[24]
12
Circularity Ratio (𝑅𝑐)
𝑅𝑐 = 4 ∗𝜋 ∗ 𝐴/𝑝2 ;Where, 𝑅𝑒 = Circularity ratio; 𝜋 = “𝑃𝑖” value that is 3.14; A = Area
of the basin (km2 ); P = Perimeter (km)
[25]
13
Elongation Ratio (𝑅𝑒)
𝑅𝑒 = (2/𝐿𝑏)∗ 𝑠𝑞𝑟𝑡 (𝐴/𝜋); Where, Re = Elongation ratio 𝐴 = Area of the basin (km2 );
𝜋 = “𝑃𝑖” value that is 3.14; 𝐿𝑏 = Basin length
[23]
14
Length of overland flow (𝐿𝑔)
𝐿𝑔 = 1/D ∗ 2; Where, 𝐿𝑔 = Length of overland flow; D = Drainage density
[22]
15
Constant Channel
Maintenance (𝐶)
𝐶 = 1/𝐷; Where, D = Drainage density
[23]
16
Texture Ratio (𝑇)
𝑇 = 𝑁1/𝑃; Where, N1 = Total number of streams in 1st order; P = Perimeter of basin
[23]
17
Shape index (𝑆𝑤)
18
Ruggedness number (𝑅𝑛)
19
Shape Factor (𝑅𝑠)
20
Drainage Intensity (𝐷𝑖)
21
Compactness coefficient (𝐶𝑐)
𝑅𝑏𝑚 = Average of bifurcation ratios of all orders
2
[10]
𝑆𝑤 = 𝐿𝑏 /𝐴; Where, 𝐿𝑏 = Basin length; A = Area of basin
[22]
𝑅𝑛 = 𝐵ℎ ∗ 𝐷; Where, 𝐵ℎ = Basin relief; D = Drainage density
[26]
𝑅𝑠 = 𝑃𝑢/𝑃𝑐; Where, 𝑃𝑢 = Perimeter of circle of watershed area; 𝑃𝑐 = Perimeter of
watershed
𝐷𝑖 = 𝐹𝑠/𝐷𝑑; Where, 𝐹𝑠 = Stream frequency; 𝐷𝑑 = Drainage density
𝐶𝑐 = 𝑃𝑐/𝑃𝑢; Where, 𝑃𝑐 = Perimeter of watershed; 𝑃𝑢 = Perimeter of circle of
watershed area
the present study as depicted in Table 7, Rh ranges from a
minimum of 0.14 in WS9 to a maximum of 0.61 in WS17.
Higher values of Rh indicate that intense erosion processes
are taking place. This indicates that WS17 is more susceptible
to erosion, and WS9 is the least among all the subwatersheds
of the study area if this parameter alone is considered for
erosion intensity analysis.
3.6. Drainage Density (D). Factors which affect 𝐷 are characteristically same as those affecting length of the stream,
[27]
[28]
[19]
namely, resistance to weathering, permeability of rock formation, climate, vegetation, and so forth. The travel time
by water within the basin is controlled by D [49–51]. In
humid regions, it varies between 0.55 and 2.09 km/km2 [52].
Generally, D has a low value in regions underlain with
highly resistant permeable material with vegetative cover
and low relief. High drainage density is observed in the
regions of weak and impermeable subsurface material and
sparse vegetation and mountainous relief. Perusal of the 𝐷
values from Table 5 indicates that WS17, WS14, and WS11
have low 𝐷 values (below 2.0 km/km2 ), while WS1, WS15,

6. 6
Geography Journal
Table 2: Some important basin characteristics.
Minimum
Subwatersheds elevation
(km)
WS1
2.10
WS2
2.25
WS3
2.25
WS4
2.50
WS5
2.83
WS6
2.92
WS7
3.05
WS8
3.04
WS9
2.53
WS10
2.49
WS11
2.41
WS12
2.30
WS13
2.26
WS14
2.25
WS15
2.23
WS16
2.16
WS17
2.08
Maximum
2
elevation Relative relief Perimeter (km) Basin area (km ) Basin length (km) Longest flow path (km)
(km)
1.47
18.30
10.45
3.52
4.03
3.57
1.32
15.84
10.88
5.29
6.79
3.56
1.32
15.84
10.88
14.29
17.68
3.56
1.93
17.71
11.94
3.36
4.34
4.42
1.43
9.52
4.28
2.95
3.40
4.26
1.97
21.54
19.78
6.33
7.06
4.89
2.24
33.10
48.17
12.09
14.95
5.29
1.71
30.55
37.58
8.87
10.74
4.75
2.10
54.04
88.15
14.71
16.77
4.62
1.88
30.00
41.76
11.09
12.98
4.37
1.82
17.09
11.72
6.33
8.14
4.23
1.99
16.67
9.52
6.09
6.88
4.29
2.11
17.92
10.50
4.06
7.82
4.37
1.78
11.61
6.55
7.90
9.62
4.03
2.04
21.09
15.60
4.35
5.51
4.27
2.04
12.98
8.30
2.17
2.34
4.20
1.31
9.90
4.61
2.17
2.34
3.40
Table 3: Showing stream order, stream number, and stream lengths of subwatersheds.
Subwatershed
WS1
WS2
WS3
WS4
WS5
WS6
WS7
WS8
WS9
WS10
WS11
WS12
WS13
WS14
WS15
WS16
WS17
Stream order
4
4
5
4
4
4
5
5
5
5
4
3
3
3
4
3
2
I
46
44
253
53
19
86
218
195
437
171
40
60
59
20
67
39
12
Stream number
II
III
12
3
9
2
71
14
13
2
8
2
35
7
106
12
92
10
225
21
99
7
10
2
17
1
14
1
6
1
17
3
10
2
4
—
WS16, WS4, WS3, WS2, WS5, and WS10 have moderate 𝐷
values (2.0–2.5 km/km2 ). Subwatersheds WS6, WS9, WS12,
WS7, WS8, and WS13 have high 𝐷 values (between 2.5 and
3.0 km/km2 ). The low and moderate 𝐷 watersheds reveal
that they are composed of permeable subsurface material,
good vegetation cover, and low relief which results in more
infiltration capacity and comparably are good sites for ground
water recharge as compared to high 𝐷 watersheds [53, 54].
IV
1
1
3
1
1
1
2
2
5
2
1
—
—
—
1
—
—
V
—
—
1
—
—
—
1
1
1
1
—
—
—
—
—
—
—
I
13.63
13.63
82.60
18.11
6.43
28.61
83.13
61.74
132.17
55.62
11.78
17.97
20.26
8.34
20.84
12.27
3.39
Stream length (km)
II
III
IV
3.50
4.05
0.84
3.81
7.01
1.94
19.39
20.44
17.49
5.54
4.25
0.15
1.71
1.60
0.86
12.82
5.36
5.34
34.62
19.93
3.01
25.06
14.73
8.82
66.02
26.08
12.57
26.89
6.31
11.93
3.15
2.60
4.22
4.47
5.61
—
4.66
6.70
—
2.45
0.72
—
5.37
2.10
6.21
2.32
4.62
—
2.05
—
—
V
—
—
2.79
—
—
—
1.76
1.76
7.76
3.31
—
—
—
—
—
—
—
On the basis of D, WS17 will have the greatest basin lag time,
while WS13 will demonstrate the shortest lag time.
3.7. Drainage Texture (Rt). Drainage texture (Rt) is influenced by infiltration capacity [22]. There are five different
texture classes: very coarse (<2), coarse (2–4), moderate
(4–6), fine (6–8), and very fine (>8) [55]. According to this

7. Geography Journal
7
Table 4: Showing comparative mean stream length and stream length ratios.
Subwatershed
I
0.29
0.30
0.32
0.34
0.33
0.33
0.38
0.31
0.30
0.32
0.29
0.29
0.34
0.41
0.31
0.31
0.28
WS1
WS2
WS3
WS4
WS5
WS6
WS7
WS8
WS9
WS10
WS11
WS12
WS13
WS14
WS15
WS16
WS17
Mean stream length (km)
II
III
IV
0.29
1.35
0.84
0.42
3.50
1.94
0.27
1.46
5.83
0.42
2.12
0.15
0.21
0.79
0.86
0.36
0.76
5.34
0.32
1.66
1.50
0.27
1.47
4.41
0.29
1.24
2.51
0.27
0.90
5.96
0.31
1.30
4.22
0.26
5.61
—
0.33
6.69
—
0.40
0.71
—
0.31
0.69
6.20
0.23
2.31
—
0.51
—
—
V
—
—
2.79
—
—
—
1.76
1.76
7.76
3.31
—
—
—
—
—
—
—
II/I
0.25
0.27
0.23
0.30
0.26
0.44
0.41
0.40
0.49
0.48
0.26
0.24
0.23
0.29
0.25
0.18
0.60
Stream length ratio
III/II
IV/III
1.15
0.20
1.84
0.27
1.05
0.85
0.76
0.03
0.93
0.53
0.41
0.99
0.57
0.15
0.58
0.59
0.39
0.48
0.23
1.89
0.82
1.62
1.25
—
1.43
—
0.29
—
0.39
2.96
1.99
—
—
—
V/IV
—
—
0.15
—
—
—
0.58
0.19
0.61
0.27
—
—
—
—
—
—
—
Table 5: Showing bifurcation ratios, drainage density, and stream frequency of the subwatersheds.
Subwatershed
WS1
WS2
WS3
WS4
WS5
WS6
WS7
WS8
WS9
WS10
WS11
WS12
WS13
WS14
WS15
WS16
WS17
I/II
3.83
4.89
3.56
4.08
2.38
2.46
2.06
2.12
1.94
1.73
4.00
3.53
4.21
3.33
3.94
3.90
3.00
Bifurcation ratio
II/III III/IV
4.00
3.00
4.50
2.00
5.07
4.67
6.50
2.00
4.00
2.00
5.00
7.00
8.83
6.00
9.20
5.00
10.71
4.20
14.14
3.50
5.00
2.00
17.00
—
14.00
—
6.00
—
5.67
3.00
5.00
—
—
—
IV/V
—
—
3.00
—
—
—
2.00
2.00
5.00
2.00
—
—
—
—
—
—
—
Mean bifurcation ratio
Drainage density
Stream frequency
Drainage intensity
3.61
3.80
4.08
4.19
2.79
4.82
4.72
4.58
5.62
5.34
3.67
10.26
9.11
4.67
4.20
4.45
3.00
2.11
2.43
2.36
2.35
2.48
2.64
2.96
2.98
2.69
2.49
1.86
2.95
3.01
1.76
2.21
2.32
1.18
5.93
5.15
5.63
5.78
7.02
6.52
7.04
7.98
7.82
6.70
4.52
8.19
7.05
4.12
5.64
6.15
3.47
2.82
2.12
2.39
2.46
2.83
2.47
2.38
2.68
2.91
2.69
2.44
2.78
2.34
2.35
2.55
2.65
2.94
classification, WS17 has very coarse drainage texture, WS1,
WS2, WS4, WS5, WS11, WS14, and WS16 have coarse Rt,
WS3, WS6, WS12, WS13, and WS15 have moderate Rt, and
WS7, WS8, WS9, and WS10 have very fine Rt (Table 6).
Hydrologically very coarse texture watersheds have large
basin lag time periods [56] followed by coarse, fine, and very
fine texture classes. This indicates that WS17 (Rt = 1.62) shows
longer duration to peak flow, while WS9 (Rt = 12.75) shows
the shortest.
3.8. Form Factor (Rf). The basins with high form factors
have high peak flows of shorter duration, whereas elongated
subwatersheds with low form factors have lower peak flow
of longer duration [57–59]. In this study, WS2, WS3, WS7,
WS10, WS11, WS13, WS14, and WS15 show lower form
factor (Table 7) indicating elongated shape and suggesting
flat hydrograph peak for longer duration. Flood flows of
such elongated basins are easier to manage than those of the
circular basin. WS5, WS6, WS8, WS9, WS12, and WS16 have

8. 8
Geography Journal
Table 6: Showing drainage texture, constant channel maintenance, shape index, ruggedness number, and shape factor.
Drainage texture
Constant channel
maintenance
Compactness
coefficient
Shape index
Ruggedness number
Shape factor
WS1
3.39
0.47
1.60
1.19
0.70
0.63
Subwatershed
WS2
3.54
0.41
1.36
2.57
0.54
0.74
WS3
5.63
0.42
2.20
3.37
1.19
0.46
WS4
3.90
0.43
1.45
0.94
0.82
0.69
WS5
3.15
0.40
1.30
2.03
0.58
0.77
WS6
5.99
0.38
1.37
2.03
0.75
0.73
WS7
10.24
0.34
1.35
3.03
0.76
0.74
WS8
9.82
0.34
1.41
2.09
0.57
0.71
WS9
12.75
0.37
1.62
2.46
0.78
0.62
WS10
9.33
0.40
1.31
2.95
0.75
0.76
WS11
3.10
0.54
1.41
3.42
0.98
0.71
WS12
4.68
0.34
1.52
3.90
0.67
0.66
WS13
4.13
0.33
1.56
4.02
0.70
0.64
0.57
1.28
2.52
1.01
0.78
0.92
0.66
WS14
2.33
WS15
4.17
0.45
1.51
4.00
WS16
3.93
0.43
1.27
2.28
0.88
0.79
WS17
1.62
0.85
1.30
1.02
1.11
0.77
Table 7: Showing important morphometric parameters of the subwatersheds.
Subwatershed
WS1
WS2
WS3
WS4
WS5
WS6
WS7
WS8
WS9
WS10
WS11
WS12
WS13
WS14
WS15
WS16
WS17
Relief ratio
0.42
0.25
0.20
0.57
0.49
0.31
0.19
0.19
0.14
0.17
0.29
0.33
0.32
0.44
0.26
0.47
0.61
Elongation ratio
1.04
0.70
0.61
1.16
0.79
0.79
0.65
0.78
0.72
0.66
0.61
0.57
0.56
0.71
0.56
0.75
1.12
Texture ratio
2.51
2.78
4.18
2.99
2.00
3.99
6.59
6.38
8.09
5.70
2.34
3.60
3.29
1.72
3.18
3.01
1.21
slightly circular shape as suggested by moderately higher Rf.
Subwatersheds WS1, WS4, and WS17 have high Rf indicating
that they have developed into quite circular to rectangular
shape. Watershed morphology has profound impacts on the
watershed hydrology [60].
3.9. Elongation Ratio (Re). The value of elongation ratio
(Re) generally varies from 0.6 to 1.0 associated with a wide
Circularity ratio
0.39
0.54
0.21
0.48
0.59
0.54
0.55
0.51
0.38
0.58
0.50
0.43
0.41
0.61
0.44
0.62
0.59
Form factor
0.84
0.39
0.30
1.06
0.49
0.49
0.33
0.48
0.41
0.34
0.29
0.26
0.25
0.40
0.25
0.44
0.98
Length of overland flow
0.23
0.17
0.18
0.18
0.16
0.14
0.11
0.11
0.14
0.16
0.29
0.12
0.11
0.32
0.20
0.19
0.72
variety of climate and geology. Values close to 1.0 are typical
of regions of very low relief whereas, that from 0.6 to 0.8
are associated with high relief and steep ground slope [7].
These values can be grouped into three categories, namely,
circular (>0.9), oval (0.9–0.7), and less elongated (<0.7). Re
for the subwatersheds WS13, WS15, WS12, WS3, WS11, WS7,
and WS10 is less than 0.70 which indicates that subwatersheds
are elongated with high relief and steep slope. WS2, WS14,
WS9, WS16, WS8, WS5, and WS6 sub-watersheds fall in oval

9. Geography Journal
9
chronological order is 0.22, 0.16, 0.18, 0.18, 0.16, 0.14, 0.11, 0.11,
0.76, 0.16, 0.29, 0.11, 0.11, 0.32, 0.2, 0.18, and 0.71, respectively.
The Lg for subwatersheds WS2-WS10, WS12, WS13, and WS16
indicates steep slopes and shorter flow paths, while as Lg for
WS1, WS11, WS14, WS15, and WS17 indicates gentle slopes
and longer flow paths.
3
Stream length (log10 )
2.5
2
1.5
1
0.5
0
1
2
WS1
WS2
WS3
WS4
WS5
WS6
WS7
WS8
WS9
3
Stream order
4
5
WS10
WS11
WS12
WS13
WS14
WS15
WS16
WS17
Figure 3: Showing relation between stream order and length of
streams for 17 subwatersheds.
category, while subwatersheds WS1, WS17 and WS4 fall in
the circular category (Table 7). The circular watersheds have
quick, though lower, hydrograph peak compared to the oval
and elongated watersheds [61, 62]. This indicates that WS13
will show delayed time to peak flow, while WS4 will show
shorter time to peak.
3.10. Circulatory Ratio (Rc). It is that ratio of the area of the
basin to the area of circle having the same circumference as
the perimeter of the basin [25]. Many of the important basin
characteristics influence Rc such as length and frequency of
streams, geological structures, land use/land cover, climate,
relief, and slope of the basin. In the present case, Rc for
subwatersheds WS8, WS2, WS6, WS7, WS10, WS5, WS17,
WS14, and WS16 is in the range from 0.53 to 0.62 indicating
that the area is characterized by high relief, elongated, and
permeable surface resulting in greater basin lag times, while
WS3, WS9, WS1, WS13, WS12, WS15, WS4, and WS11 have
lower circularity ratios indicating low relief and impermeable
surface resulting in lower basin lag times (Table 7). This
indicates that WS16 will show delayed time to peak flow,
while WS3 will show shorter time to peak. Rf, Re, and
Rc significantly influence the hydrological response of the
watersheds as basin shape, and the arrangement of stream
segments combine to influence the size and shape of flood
peaks [63].
3.11. Length of Overland Flow (Lg). Length of overland flow
is one of the most important independent variables affecting
both hydrologic and hydrographic development of drainage
basins [24]. Table 7 reveals that Lg for the 17 subwatersheds in
3.12. Constant of Channel Maintenance (C). In the present
study, C varies from 0.33 for W8 and W9 to 0.84 for W17 as is
shown in Table 6. The reciprocal of the drainage density (D)
is constant of channel maintenance and signifies how much
drainage area is required to maintain a unit length of channel.
Low values of 𝐶 in case of WS8 and WS9 indicates that
among all the 17 subwatersheds, these two are associated with
weakest or very low-resistance soils, sparse vegetation and
mountainous terrain, while the watershed WS17 is associated
with resistance soils, vegetation and comparably plain terrain
[64].
3.13. Compactness Coefficient (Cc). Compactness coefficient
expresses the relationship of a basin with that of a circular
basin having the same area. A circular basin yields the
shortest time of concentration before peak flow occurs in the
basin. 𝐶𝑐 = 1 indicates that the basin completely behaves as
a circular basin. 𝐶𝑐 > 1 indicates more deviation from the
circular nature of the basin. The values for all the subwatersheds range from 1.27 for WS16 to 2.20 for WS3, as seen in
Table 6. Consequently, WS16 has the greatest deviation from
the circular nature, and on the basis of this parameter alone,
it will have the longest time of concentration before peak flow
occurs in the basin out of all the subwatersheds [60–62].
3.14. Shape Index (Sw). Rate of water and sediment yield
along the length and relief of the drainage basin is largely
affected by the shape. The shape index values for subwatersheds of the study area range from 0.94 in WS4 to 4.02 in
WS13 as shown in Table 6. In terms of Sw only, WS13 will have
the shorter basin lag time, while WS4 will have the longer
basin lag time.
3.15. Texture Ratio (T). Texture ratio is one of the most
important factors in the drainage morphometric analysis,
which depends on the underlying lithology infiltration capacity, and relief aspect of the terrain is the texture ratio [65, 66].
As shown in Table 7, T varies between 1.21 in case of WS17
and 8.09 in case of WS9. Hydrologically, it can be said that
WS17 in terms of 𝑇alone will have the longest basin lag times
and WS9 will have the shortest. This reaffirms the results and
conclusions drawn from the values of U, D, Fs, and Rt in case
of W17.
3.16. Ruggedness Number (Rn). The ruggedness number indicates the structural complexity of the terrain in association
with the relief and drainage density. It also implies that the
area is susceptible to soil erosion [67, 68]. In present study, the
ruggedness number is minimum in case of WS2 (𝑅𝑛 = 0.54)
and maximum in WS3 (𝑅𝑛 = 1.19) as seen in Table 6. This
indicates that WS2 is least susceptible to erosion and WS3

10. 10
Geography Journal
Stream order map of subwatershed 1
Stream order map of subwatershed 2
N
N
W
E
34∘ 4 󳰀 0 󳰀󳰀
W
E
S
S
34∘ 5 󳰀 0 󳰀󳰀
34∘ 3 󳰀 0 󳰀󳰀
est
W
L id
de
34∘ 2 󳰀 0 󳰀󳰀
rR
34∘ 4 󳰀 0 󳰀󳰀
r
ive
W
es
34∘ 1 󳰀 0 󳰀󳰀
tL
id
Kilometers
0 0.45 0.9
75∘ 17 󳰀 0 󳰀󳰀
75∘ 18 󳰀 0 󳰀󳰀
75∘ 19 󳰀 0 󳰀󳰀
75∘ 20 󳰀 0 󳰀󳰀
75∘ 21 󳰀 0 󳰀󳰀
W
0 0.35 0.7
75∘ 18 󳰀 0 󳰀󳰀
1.4
75∘ 19 󳰀 0 󳰀󳰀
Stream order map of subwatershed 4
E
34 9 0
Kilometers
iv
er
75∘ 17 󳰀 0 󳰀󳰀
34∘ 10 󳰀 0 󳰀󳰀
N
∘ 󳰀 󳰀󳰀
rR
1.8
Stream order map of subwatershed 3
34∘ 10 󳰀 0 󳰀󳰀
de
N
W
E
S
S
34∘ 9 󳰀 0 󳰀󳰀
34∘ 8 󳰀 0 󳰀󳰀
34∘ 7 󳰀 0 󳰀󳰀
34∘ 8 󳰀 0 󳰀󳰀
34∘ 6 󳰀 0 󳰀󳰀
st
We
34∘ 5 󳰀 0 󳰀󳰀
34∘ 7 󳰀 0 󳰀󳰀
L id
der
75∘ 15 󳰀 0 󳰀󳰀
West Lidder River
Kilometers
Kilometers
er
Riv
34∘ 4 󳰀 0 󳰀󳰀
0 0.5 1
75∘ 17 󳰀 0 󳰀󳰀
75∘ 19 󳰀 0 󳰀󳰀
2
0 0.45 0.9
75∘ 21 󳰀 0 󳰀󳰀
75∘ 14 󳰀 0 󳰀󳰀
Stream order map of subwatershed 5
75∘ 16 󳰀 0 󳰀󳰀
1.8
75∘ 17 󳰀 0 󳰀󳰀
Stream order map of subwatershed 6
34∘ 12 󳰀 0 󳰀󳰀
N
W
75∘ 15 󳰀 0 󳰀󳰀
N
W
E
E
S
S
34∘ 11 󳰀 0 󳰀󳰀
34∘ 10 󳰀 0 󳰀󳰀
Wes
tL
idde
idde
r Riv
er
r Riv
er
34∘ 10 󳰀 0 󳰀󳰀
Wes
tL
34∘ 9 󳰀 0 󳰀󳰀
Kilometers
0 0.25 0.5
1
34∘ 9 󳰀 0 󳰀󳰀
75∘ 15 󳰀 0 󳰀󳰀
Kilometers
34∘ 8 󳰀 0 󳰀󳰀
0 0.5 1
∘
75∘ 16 󳰀 0 󳰀󳰀
75 15 0
Stream order map of subwatershed 7
W
∘
󳰀 󳰀󳰀
75 16 0
∘
󳰀 󳰀󳰀
75 17 0
∘
󳰀 󳰀󳰀
75 18 0
2
75∘ 19 󳰀 0 󳰀󳰀
Stream order map of subwatershed 8
N
N
34∘ 14 󳰀 0 󳰀󳰀
󳰀 󳰀󳰀
E
34∘ 15 󳰀 0 󳰀󳰀
S
W
E
S
34∘ 13 󳰀 0 󳰀󳰀
34∘ 14 󳰀 0 󳰀󳰀
∘
󳰀 󳰀󳰀
34 12 0
34∘ 13 󳰀 0 󳰀󳰀
34∘ 11 󳰀 0 󳰀󳰀
34∘ 12 󳰀 0 󳰀󳰀
West Lidder River
34∘ 10 󳰀 0 󳰀󳰀
0 0.5 1
75∘ 16 󳰀 0 󳰀󳰀
75∘ 18 󳰀 0 󳰀󳰀
75∘ 20 󳰀 0 󳰀󳰀
Watershed boundary
Stream order
1
2
West Lidder River
34∘ 11 󳰀 0 󳰀󳰀
Kilometers
34∘ 9 󳰀 0 󳰀󳰀
Kilometers
0 0.5 1
2
75∘ 22 󳰀 0 󳰀󳰀
3
4
5
75∘ 12 󳰀 0 󳰀󳰀
75∘ 14 󳰀 0 󳰀󳰀
Watershed boundary
Stream order
1
2
(a)
Figure 4: Continued.
2
75∘ 16 󳰀 0 󳰀󳰀
3
4
5

11. Geography Journal
11
Stream order map of subwatershed 9
Stream order map of subwatershed 10
N
∘
E
N
W
S
E
S
󳰀 󳰀󳰀
∘
W
West Lidder River
34∘ 12 󳰀 0 󳰀󳰀
34∘ 9 󳰀 0 󳰀󳰀
󳰀 󳰀󳰀
34 11 0
34∘ 8 󳰀 0 󳰀󳰀
34 10 0
34∘ 7 󳰀 0 󳰀󳰀
34∘ 9 󳰀 0 󳰀󳰀
34∘ 8 󳰀 0 󳰀󳰀
34∘ 6 󳰀 0 󳰀󳰀
st
We
34∘ 7 󳰀 0 󳰀󳰀
34∘ 5 󳰀 0 󳰀󳰀
L id
der
34∘ 6 󳰀 0 󳰀󳰀
0
75∘ 6 󳰀 0 󳰀󳰀
75∘ 8 󳰀 0 󳰀󳰀
75∘ 10 󳰀 0 󳰀󳰀
75∘ 12 󳰀 0 󳰀󳰀
1
2
4
75∘ 14 󳰀 0 󳰀󳰀
Kilometers
er
Riv
Kilometers
34∘ 5 󳰀 0 󳰀󳰀
34∘ 4 󳰀 0 󳰀󳰀
75∘ 16 󳰀 0 󳰀󳰀
75∘ 9 󳰀 0 󳰀󳰀
Stream order map of subwatershed 11
E
N
W
er
S
r
ve
Ri
er River
34∘ 6 󳰀 0 󳰀󳰀
E
dd
S
2
75∘ 15 󳰀 0 󳰀󳰀
Li
W
75∘ 13 󳰀 0 󳰀󳰀
Stream order map of subwatershed 12
dd
West Li
N
75∘ 11 󳰀 0 󳰀󳰀
t
es
W
34∘ 7 󳰀 0 󳰀󳰀
0 0.5 1
34∘ 5 󳰀 0 󳰀󳰀
34∘ 5 󳰀 0 󳰀󳰀
34∘ 4 󳰀 0 󳰀󳰀
34∘ 4 󳰀 0 󳰀󳰀
Kilometers
0 0.4 0.8
75∘ 12 󳰀 0 󳰀󳰀
75∘ 13 󳰀 0 󳰀󳰀
75∘ 14 󳰀 0 󳰀󳰀
0 0.35 0.7
75∘ 15 󳰀 0 󳰀󳰀
75∘ 13 󳰀 0 󳰀󳰀
75∘ 14 󳰀 0 󳰀󳰀
75∘ 15 󳰀 0 󳰀󳰀
1.4
75∘ 16 󳰀 0 󳰀󳰀
Stream order map of subwatershed 14
Stream order map of subwatershed 13
N
tL
Wes
N
W
Kilometers
34∘ 3 󳰀 0 󳰀󳰀
1.6
E
W
er
r Riv
34∘ 4 󳰀 0 󳰀󳰀
E
West Lidder River
S
idde
S
34∘ 4 󳰀 0 󳰀󳰀
34∘ 3 󳰀 0 󳰀󳰀
34∘ 3 󳰀 0 󳰀󳰀
Kilometers
Kilometers
34∘ 2 󳰀 0 󳰀󳰀
0 0.35 0.7
75∘ 13 󳰀 0 󳰀󳰀
75∘ 14 󳰀 0 󳰀󳰀
75∘ 15 󳰀 0 󳰀󳰀
0 0.25 0.5
1.4
Stream order map of subwatershed 15
W
34 3 0
de
W
E
tL
r
ive
es
W
S
rR
S
N
∘ 󳰀 󳰀󳰀
L id
34∘ 3 󳰀 0 󳰀󳰀
E
1
75∘ 17 󳰀 0 󳰀󳰀
Stream order map of subwatershed 16
est
W
N
75∘ 16 󳰀 0 󳰀󳰀
75∘ 15 󳰀 0 󳰀󳰀
75∘ 16 󳰀 0 󳰀󳰀
id
de
rR
r
ive
34∘ 2 󳰀 0 󳰀󳰀
34∘ 2 󳰀 0 󳰀󳰀
34∘ 1 󳰀 0 󳰀󳰀
34∘ 1 󳰀 0 󳰀󳰀
Kilometers
0 0.45 0.9
75∘ 14 󳰀 0 󳰀󳰀
75∘ 15 󳰀 0 󳰀󳰀
75∘ 16 󳰀 0 󳰀󳰀
Watershed boundary
Stream order
1
2
Kilometers
0 0.3 0.6
1.8
75∘ 17 󳰀 0 󳰀󳰀
75∘ 16 󳰀 0 󳰀󳰀
3
4
5
75∘ 17 󳰀 0 󳰀󳰀
Watershed boundary
Stream order
1
2
(b)
Figure 4: Continued.
1.2
75∘ 18 󳰀 0 󳰀󳰀
3
4
5

12. 12
Geography Journal
Stream order map of subwatershed 17
N
W
E
st
We
34∘ 2 󳰀 0 󳰀󳰀
S
L id
de
rR
r
ive
34∘ 1 󳰀 0 󳰀󳰀
Kilometers
0 0.2 0.4
75∘ 17 󳰀 0 󳰀󳰀
0.8
75∘ 18 󳰀 0 󳰀󳰀
75∘ 19 󳰀 0 󳰀󳰀
Watershed boundary
Stream order
1
2
(c)
Figure 4: (a) Showing drainage maps of subwatersheds, WS1–WS8. (b) Showing drainage maps of subwatersheds, WS9–WS16. (c) Showing
drainage patterns of WS17 of West Lidder catchment.
is most susceptible among all the subwatersheds of the study
area.
3.17. Shape Factor (Rs). The shape factor observed in the
study area is minimum in case of WS3 (𝑅𝑠 = 0.46) and
maximum in case of WS16 (𝑅𝑠 = 0.79), as shown in Table 6.
This parameter is similar in interpretation to circularity ratio,
elongation ratio, and form factor. It gives an idea about
the circular character of the basin. The greater the circular
character of the basin is, the greater is the rapid response of
the watershed after a storm event [60]. Therefore, in terms of
Rs only, WS3 has the longest basin lag time, and WS16 the
shortest.
4. Conclusion
From the integrated analysis of the results on the morphometry of the 17 subwatersheds, it is concluded that the
whole study area has uniform underlying lithology making
the hydrological response in these subwatersheds a direct
function of the geomorphology, the topography, and the
existing vegetation conditions only. The spatial variability
of the morphometric parameters analyzed in this study is
quite significant. Since, the hydrology of a watershed changes
significantly due to the spatial variations of the morphometric parameters, the subwatersheds will therefore also
exhibit differential hydrological behaviour. Overall results
indicated that comparatively WS16, WS13, WS12, and WS9
shall contribute dominantly to the stream runoff in the
West Lidder catchment, and on the contrary, WS17, WS5,
and WS3 shall contribute the least due to the cumulative
and integrated effect of the morphometric parameters whose
significance and influences on the hydrological behaviour
have been discussed in detail in the preceding sections.
Because of the close relationship between the morphometric
parameters and the mean annual flood, it is concluded, on
the basis of the range of the morphometric analysis, that
WS16, WS13, WS12, and WS9, in that order, are more prone
to flooding compared to the other 13 subwatersheds of the
West Lidder catchment. The hydrological behaviour of these
17 subwatersheds shall have profound influences on the flood
vulnerability and flood risk in the downstream portions of
the Lidder River. It is hoped that information and knowledge
generated under this study shall guide the informed planning
and decision-making for flood disaster risk reduction in the
Lidder watershed that forms an important tributary of the
Jhelum basin.
Acknowledgments
This research work has been accomplished under a research
grant provided by the Department of Science and Technology, Government of India for the project titled “Integrated
Flood vulnerability Assessment for Flood Risk Management
and Disaster Mitigation.” The authors express their gratitude
to the funding agency for the financial assistance. The authors
also express their sincere thanks to anonymous reviewers
whose valuable comments have improved the quality of this
paper.
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